Time travel is the cutting edge of modern research. Like gravity waves, temporal waves can now be detected and traced back to the time and place of their origin, even making it possible for one to travel back in time. Or at least for one's consciousness to be projected through a wormhole to appear in a three-dimensional projection of one's original body, thanks to the temporal projection chamber. Only three countries have the apparatus to make this event possible: the United States, Germany, and Japan. But now two scientists at a symposium on time travel have been killed, followed nearly immediately by the detection of a time displacement wave, or TDW-the signature of someone traveling back in time to change the past. Who they are and what they want to change is unknown. What is known is that there are only two days to rectify the situation before history settles into a new pattern. Special Agent Lou Hessman and his team are now tasked with going back to the New York City of the year 1919 to find and stop the other team behind this TDW. Not an easy task under any circumstance, but the question remains: Are these changes something they want to fix?